KR100900405B1 - Led lamp for illumination - Google Patents

Abstract

An LED lamp for illumination is provided to condense a light of a LED on a desired lighting region by installing a reflection plate around a LED module. A receiving space(101) is formed inside a housing(100). A front of the receiving space is opened. A base(105) is arranged in a rear of the housing. A plurality of intake holes(104) is formed around the base. A LED module(120) is mounted in a front of a reflection plate(110). The reflection plate is mounted in an opening part of the front of the housing. The reflection plate reflects a light of the LED module. A plurality of exhaust holes(111) is formed in the reflection plate with a fixed interval. A heat sink(130) is installed in a rear of the reflection plate in order to contact with the LED module. A cooling fan(140) is installed in a rear of the heat sink. The cooling fan ejects the air flowed through the intake hole to outside through the exhaust hole. A power control part supplies a power source to the LED module and the cooling fan.

Description

LED Lamp for Lighting {LED LAMP FOR ILLUMINATION}

The present invention relates to a lighting LED lamp, and more particularly, to effectively cool the heat generated during the operation of the LED and to focus the irradiation of the light generated by the LED to the lighting area to replace the existing low-efficiency bulb energy of the outdoor lighting facility The present invention relates to an LED lamp for lighting that can improve efficiency.

In general, filament and discharge light emitting lamps such as metal halide lamps, mercury lamps, sodium lamps are mainly used in outdoor lighting facilities such as street lamps and security lamps. The existing lamp is provided with a power socket on the outside and the inside of the shielded globe so that rain water does not flow in, and has a structure in which the base of the bulb is inserted into and connected to the socket. However, since the existing filament and discharge light bulbs emit a significant portion of the power supplied as heat, the energy output from visible light used for actual lighting is only about 5 to 28% of the power used, resulting in energy efficiency. There is a downside to this.

On the other hand, since LEDs have a high energy efficiency of about 50 to 60% and can provide high-quality lighting with less energy, they are spotlighted as a new lighting means to replace existing light bulbs. However, LEDs also generate heat during operation. Conventional bulbs maintain good performance even at relatively high temperatures, so that they can be used perfectly even when installed inside poorly cooled globes. Since the degree of heat is the limit of heat resistance, when installed outside and inside a shielded glove, performance is lost due to heat generated during operation.

Accordingly, although LEDs can be used as a light emitting means in a conventional lighting unit in which the light emitting unit is exposed to the outside and has a relatively small capacity, the light emitting unit is large and is installed inside a space that is shielded from the outside, such as a globe of a lighting facility. LED can not be used as a lighting lamp, there is a problem that can be used to the existing light bulb of very low energy efficiency.

In addition, the LED lamp itself may be equipped with a cooling device, but in this case, it is impossible to mount it as it is inside the globe of the existing lighting system. Therefore, in order to use it, a significant modification and replacement of the existing lighting system is required. There was.

On the other hand, among the conventional lamps using LEDs, by providing a plate-shaped reflector behind the LED and intensively irradiating the generated light of the LED to a predetermined area in front of the LED, the lighting efficiency can be further improved. However, in such a case, since the space is blocked by the reflector, heat generated during the operation of the LED cannot be released, and thus, the lamp installed in the above-mentioned glove is more difficult to use due to the poor cooling. there was.

The present invention is to solve the problems as described above, lighting LED lamp for improving the cooling efficiency through the forced circulation supply of air to replace the existing low-efficiency bulb without modifying or replacing the existing lighting installations The purpose is to provide.

In addition, the present invention is provided with a reflecting plate to focus the light of the LED to the illumination area, while emitting a smooth operating heat of the LED to prevent the performance degradation due to poor cooling while high lighting efficiency There is another purpose to providing a.

In order to achieve the above object, the present invention provides a housing having a front opening therein, a base having a base connected to a socket of a lighting system at the rear thereof, and having a suction hole formed around the base; An LED module installed at an opening side of the housing to face forward and irradiating light to the outside according to a power supply; A reflection plate installed to be in direct or indirect contact with a rear portion of the LED module and made of a metal material to reflect the light of the LED module to the front, and to radiate the heat of operation of the LED module, and a plurality of exhaust holes formed at predetermined intervals; A heat sink installed at the rear of the reflector in the housing to be in direct or indirect contact with the LED module to dissipate the heat of operation of the LED module; A cooling fan installed at the rear of the heat sink in the housing so that air introduced through the intake hole is discharged forward through the exhaust hole via the heat sink; And a power control unit supplying a current applied through the base to the LED module and the cooling fan to control each operation. The heat sink is provided with a plurality of heat dissipation fins at predetermined intervals along the circumferential direction. The LED lamp for illumination, characterized in that formed in a spiral inclined with respect to the flow direction of the air discharged from the cooling fan.

delete

delete

Preferably, the reflecting plate may be formed in a concave reflecting surface outward to surround a portion of the rear and side around the LED module.

In addition, the reflector is more preferably made of a plurality of stages bent to have a different reflection angle with respect to the light emitted from the LED module.

In the LED lamp of the present invention, the LED module may have a structure in which a plurality of chip-type LEDs connected in series are closely arranged with each other to form an LED group, and the plurality of LED groups are connected in parallel to be spaced at a predetermined interval.

delete

In addition, the power control unit is integrally provided on the circuit board constituting the LED module, the temperature sensor for detecting the operating temperature of the LED module and the temperature of the LED module detected by the temperature sensor of the cooling fan It is more preferable that a controller for controlling the driving speed and a blocking circuit for cutting off the current supplied to the LED when the temperature of the LED module rises above a set value.

According to the present invention as described above has the following advantages.

(1) By cooling the operating heat of the LED module by circulating and supplying the external air to the inside, damage and deterioration of the LED due to overheating are prevented even in the outside and the shielded globe. Simply insert the base into the socket, it is possible to simply install, but provide an energy-efficient lighting.

(2) By installing a reflector around the LED module, it is possible to increase the concentration of light irradiation to a desired lighting area, thereby enabling more efficient lighting.

(3) By installing a reflector plate made of metal with high thermal conductivity in connection with the LED module to quickly absorb and dissipate heat from the LED module through the reflector having a large area, the exhaust air is cooled while passing through the exhaust hole of the reflector. By promoting the cooling of the LED module is more efficient, there is an effect that can provide a large-capacity LED lamp.

(4) The reflecting surface of the reflecting plate is formed concave, and the reflecting plate is formed in a bent form in multiple stages so that the reflecting surface has a different reflecting angle according to the relative position with respect to the LED module, thereby increasing the concentration of the irradiated light to improve the lighting efficiency. It is possible to further improve and at the same time reduce the resistance to the discharged air has the effect of making the cooling of the lamp more efficient.

(5) A plurality of LEDs connected in series to form a single LED group can be placed close to each other to increase the lighting efficiency and reduce the length of resistance by reducing the length of the line.In parallel, each LED group connected in parallel is arranged at a spaced distance from each other. By dissipating heat generation, cooling of the LED module can be made more efficiently.

(6) By forming the heat sink fins in a spiral shape to form a swirling component in the flow of cooling air, turbulence is formed on the surface of the heat sink, and the amount of air contacting the heat sink is increased, and the air resistance by the LED module and the reflector is increased. There is an effect that the cooling efficiency is further improved.

(7) The temperature sensor is installed on the LED module to control the operation of the LED module and cooling fan according to the detected temperature, thereby preventing damage to the LED module due to overheating and improving the durability and life of the lamp. have.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an embodiment of an LED lamp according to the present invention, Figure 2 is a perspective view showing the LED lamp of Figure 1 in an exploded state.

LED lamp of the present invention is configured to be used to replace the existing bulb in the conventional lighting lamp having a socket inside the shielded globe and the outside for waterproofing, such as a street lamp, as shown, the receiving space opening the front A housing (100) provided therein, a reflecting plate (110) mounted at the front opening of the housing (100), an LED module (120) mounted at the front portion of the reflecting plate (110), and The heat sink 130 installed at the rear portion of the reflector 110 inside the housing 100, the cooling fan 140 installed at the rear of the heat sink 130, the LED module 120 and the cooling fan 140. It consists of a power control unit for supplying the operating power of.

The housing 100 may be formed in various structures according to the shape of the globe, such as a lamp to be mounted, in the illustrated embodiment, the shaping body is formed in the rear of the body 102 is formed in the rear of the body 102 formed in a cylindrical shape of the front and rear open the shaft shape 103 is coupled, the rear end of the body 103 is made of a structure in which the base 105 is inserted into the socket of the lamp lamp. The base 105 is provided with two power terminals connected to the socket, and each power terminal is connected to a power control unit to be described later through a power line. A plurality of intake holes 104 are formed in the rear body 103 at predetermined intervals.

The reflector plate 110 reflects the light generated by the LED module to the front to increase the lighting efficiency, while providing a passage for discharging the air transported by the cooling fan 140 to the outside, A reflective surface 112 is provided on an outward surface, and a plurality of exhaust holes 111 are formed at predetermined intervals so as to form a circular array around a central portion where the LED module 120 is located.

The reflecting plate 110 may be formed in a flat plate shape, but it is preferable that the reflecting surface 112 facing outward is formed in a concave shape so as to increase the concentration of light reflected to the outside. In the illustrated embodiment, the inner side of the reflecting surface 112 with respect to the directing direction of the LED module 120 is formed in a two-stage bent structure to form an inclined surface of about 45 °, the outside is about 30 °, LED module 120 It was exemplified that the light emitted from each direction can be focused more effectively toward the front. In addition, although not shown, when the concave-convex structure having protrusions or recesses formed on the reflective surface 112 has a high concentration of light, the lighting efficiency of the unit area may be further improved.

In the illustrated embodiment, the reflector 110 is configured to function as a medium for transferring heat of the LED module 120 to the heat sink 130. That is, the central front and rear portions of the reflector 110 are installed to be in direct contact with the LED module 120 and the heat sink 130, or indirectly through the heat transfer block 119, respectively. The structure which consists of this was illustrated. In this case, the reflective plate 110 is preferably made of a metal material having high thermal conductivity. In the case of the aluminum plate, the reflective surface 112 is more easily self-reflected through mirror processing and coating without the need for a separate reflector. Since it can be formed, it can be a preferred choice in terms of manufacturing cost. As another example, the heat conduction efficiency may be increased by using a copper plate, and the reflective surface 112 may be formed on the front surface by using a reflective coating material of aluminum or various other materials.

Although not separately illustrated, a rear surface of the LED module 120 may be formed to directly contact the heat sink 130 by forming a through hole at the center of the reflector 110. Even in such a case, it is preferable to form the reflective plate 110 with a high thermal conductivity metal so that the heat emission through the reflective plate 110 can be performed smoothly. However, when the capacitance of the lamp is small, the heat conductivity of the reflective plate is low. Since it may be separated, the material of the reflector 110 may be manufactured with various materials other than metal. For example, the reflecting plate 110 may be manufactured using a mirror made of a synthetic resin molding or glass in which the reflecting surface 112 is formed through silver foil coating or the like.

The LED module 120 is a single module by arranging a plurality of chip-shaped LED 122 on the same surface according to the required illuminance, the detailed configuration is shown in FIG. Referring to FIG. 3, in the illustrated embodiment, seven LEDs 122 adjacent to each other are arranged in a diamond shape to form one LED group 121, and each LED group 121 is spaced apart from each other by a predetermined interval. The structure of the seven LED array 120 is arranged in a diamond shape at a predetermined position. This illustrates that the 1W class LED 122 is configured to be used as a 50W class lighting lamp. Since the plurality of LEDs 122 are installed in close proximity as described above, the light of adjacent LEDs 122 is overlapped. The light emitting efficiency is improved by being irradiated in the direction, and since each LED group 121 is installed at a position spaced apart from each other, the driving heat is dispersed and heat radiation can be made more efficiently.

In addition, the LED 122 forming one LED group 121 in the LED module 120 is connected in series with each other, each LED group 121 is connected in parallel with each other, the connection line between the LED group 121 is Much thicker (preferably having a cross-sectional area of about 10 times) is used. Accordingly, the series line between the LEDs 122 is shortened to generate heat, and the resistance heat generated in the parallel lines between the LED groups 121 is reduced.

The heat sink 130 has a plurality of heat dissipation fins 131 at predetermined intervals along the circumferential direction so that an air passage for cooling is formed between each heat dissipation fin 131. Here, the heat dissipation fin 131 is formed in the air flow from the cooling fan 140 of the upper to the LED module 120 of the lower, spirally bent to form a swirl flow of air in the circumferential direction the cooling fan 140 It is formed in the form inclined at a predetermined angle (a) with respect to the conveying direction (A) of the air discharged by.

The cooling fan 140 introduces external air through the intake hole 104 of the housing 100 and discharges it to the exhaust hole 111 of the reflector 110 through the heat sink 130, thereby reducing operation noise. Therefore, it is desirable to use a silent fan equipped with a brushless motor to ensure sufficient service life.

The power control unit supplies power applied through the base 105 to each of the LEDs 122 and the cooling fan 140 so that light emission and cooling are performed. The input high-current AC current is converted into a low-voltage DC current. It includes a rectifier and transformer circuit for converting and supplying. Although the power control unit for the light emitting of the LED 122 and the operation of the cooling fan 140 may be provided separately, the integrated with the LED module 120 as in the illustrated embodiment in terms of simplicity and cooling efficiency of the structure desirable. In the illustrated embodiment, the power control unit is provided on the circuit board 129 constituting the LED module 120, and thus is integrally mounted on the front part of the reflecting plate 110. Although not shown, a power input line connected to the base 105 and a power output line connected to the cooling fan 140 are provided, and the LED module 120 is directly connected to a circuit line on a circuit board 129. do.

More preferably, the driving speed of the cooling fan 140 according to the temperature sensor for detecting the operating temperature of the LED module 120 and the temperature of the LED module 120 detected by the temperature sensor to the power control unit. The controller to adjust, the LED module 120 may be provided with a blocking circuit for blocking the current supplied to the LED 122 when overheating.

The LED lamp of the present invention configured as described above is simply installed by inserting the base 105 into a socket of a lighting lamp in the same way as a conventional bulb, and consumes significantly more power than a conventional filament or discharge light bulb. Using a low LED as a light emitting source has the advantage of reducing energy costs.

When power is applied through the base 105, a driving current is supplied by the power control unit so that the LED module 120 is turned on and the cooling fan 140 is rotated. When the LED module 120 is turned on, the light emitted from each LED 122 is irradiated to the rear by reflection of the inside as well as the front and the side, and the reflecting plate 110 having the front concave as described above is the LED module 120. Since it is installed around, the light emitted from the LED 122 is more effectively irradiated toward the front to improve the lighting efficiency. In particular, since the reflection surface 112 having a two-stage structure having different reflection angles inside and outside the reflection plate 110 is formed, the angle of the reflected light is concentrated to a predetermined area in front, thereby further improving lighting efficiency. have.

The operating heat of the LED module 120 is cooled by the air transferred by the cooling fan 140. That is, the heat of the LED module 120 is transferred to the heat sink 130, and as the cooling fan 140 rotates, air introduced into the housing 100 through the intake hole 104 is heat-sink 130. After absorbing heat while passing through the exhaust hole 111 of the reflecting plate 110 is discharged to the outside of the housing (100). At this time, since the heat sink 130 is provided with a heat radiation fin 131 inclined in a spiral to pass through the heat sink 130 while the air is turning, turbulence is increased in the air flow around the heat sink 130 and the heat sink The amount of air directly contacting the 130 is increased, thereby facilitating heat exchange, and congestion is reduced by the LED module 120 horizontally installed on the transport path of the air discharged through the heat sink 130, so that cooling efficiency is remarkable. Is improved. In addition, since the heat of the LED module 120 is transmitted and distributed to the reflector plate 110 having a large area, and the air is discharged through the exhaust hole 111 of the reflector plate 110, the heat is effectively cooled. Can be further improved. In addition, since the outer surface of the reflecting plate 110 is formed in a concave shape, the resistance to the flow of the discharged air is significantly reduced, so that the cooling effect by air is further improved as compared with the case of the flat reflector 110 Like the LED module 120, the air passing through the reflector 110 may also be discharged while turning by the heat dissipating fin 131 which is inclined spirally, thereby further improving the cooling effect.

Therefore, the lighting LED lamp of the present invention can be used in the same manner as the lamp without additional modifications to the existing outdoor lighting facility that was difficult to apply the LED lamp due to the cooling problem according to the external and shielded structure, the light of the outdoor lighting In general, it has the advantage of providing high illumination with small power.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

1 is a cross-sectional view showing an embodiment of a lighting LED lamp according to the present invention.

FIG. 2 is a perspective view illustrating an exploded state of the LED lamp of the present invention shown in FIG. 1.

3 is a perspective view showing an LED module in the LED lamp of the present invention.

<Explanation of symbols for the main parts of the drawings>

100 housing 104: intake hole

110: reflector 111: exhaust hole

119: heat conduction block 120: LED module

122: LED 130: heat sink

131: cooling fin 140: cooling fan

Claims (9)

A housing having a front opening therein and having a base connected to a socket of a lighting system at a rear thereof, and having an air intake hole formed around the base; An LED module installed at an opening side of the housing to face forward and irradiating light to the outside according to a power supply; A reflection plate installed to be in direct or indirect contact with a rear portion of the LED module and made of a metal material to reflect the light of the LED module to the front, and to radiate the heat of operation of the LED module, and a plurality of exhaust holes formed at predetermined intervals; A heat sink installed at the rear of the reflector in the housing to be in direct or indirect contact with the LED module to dissipate the heat of operation of the LED module; A cooling fan installed at the rear of the heat sink in the housing so that air introduced through the intake hole is discharged forward through the exhaust hole via the heat sink; And It includes a power control unit for supplying the current applied through the base to the LED module and the cooling fan to control each operation, The heat sink is provided with a plurality of heat dissipation fins at predetermined intervals along the circumferential direction, wherein the heat dissipation fins are formed in a spiral inclined with respect to the flow direction of the air discharged from the cooling fan. delete delete The method of claim 1, The reflecting plate is a lighting LED lamp, characterized in that the reflective surface outwardly formed so as to surround a portion of the rear and side around the LED module. The method of claim 4, wherein The reflector plate is a lighting LED lamp, characterized in that consisting of a plurality of stages bent to have a different reflection angle with respect to the light emitted from the LED module. The method according to any one of claims 1, 4 and 5, The LED module is a LED lamp for illumination, characterized in that the plurality of chip-type LEDs connected in series are arranged in close proximity to each other to form an LED group, a plurality of LED groups are arranged in parallel spaced at a predetermined interval. delete The method according to any one of claims 1, 4 and 5, The power control unit is a lighting LED lamp, characterized in that provided integrally on the circuit board constituting the LED module. The method of claim 8, A temperature sensor for sensing an operating temperature of the LED module in the power control unit, a controller for controlling a driving speed of the cooling fan according to the temperature of the LED module detected by the temperature sensor, and a temperature of the LED module is higher than a set value LED lamp for lighting, characterized in that the circuit is provided with a blocking circuit to cut off the current supplied to the LED.

Images